9 catalogued sizes, dimensioned to DIN 125 A. Pick any row and the technical drawing redraws to it.
PTFE Flat Washers to DIN 125 A are catalogued in sizes M3 to M20, with id 3.2-21 mm, od 7-37 mm, thick 0.5-3 mm. 9 sizes are held in the table below, and the technical drawing redraws to whichever row you select.
Standard
DIN 125 A
Size range
M3-M20
ID
3.2-21 mm
OD
7-37 mm
Catalogued sizes
9
Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.
What PTFE Flat Washers are specified for, industry by industry. Stocked from M3 to M20.
Industries that specify PTFE Flat Washers
Chemical & processChemically resistant seating under a fastener.
Food & pharma equipmentNon-marking, non-contaminating washers in washdown areas.
Electrical & electronicsInsulating and isolating fixings in panels and boards.
Timber & constructionLarge-diameter washers that stop pull-through in softer material.
Rotating & vibrating plantSpring, tooth and wedge types that maintain or lock bolt tension.
Steel fabricationSpreading load under a head or nut and protecting the surface finish.
Typical applications
separating dissimilar metals to break a galvanic cell
protecting a soft or finished surface under a head
insulating a fastener electrically from the panel
protecting a painted or plated surface under a turned nut
maintaining bolt tension in a joint that settles
spreading clamp load over a soft or oversized bearing face
Service conditions to specify against
Marine and coastal
Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
Hardness matters
Under a high-strength bolt a soft washer embeds into the joint and preload is lost — specify a hardened washer for structural bolting.
Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.
Dimensioned line drawing of M3 PTFE Flat Washers to DIN 125 A. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.
Inner diameter d1 (mm)
3.2
Outer diameter d2 (mm)
7
Thickness s (mm)
0.5
Material
PTFE
Temperature range (deg C)
-200 to +260
Sends the selected values to the quote form below.
Request a Quotation for PTFE Flat Washers
The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.
Dimensions & Specifications (DIN 125 A)
Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.
Manufactured to DIN 125 A, PTFE Flat Washers are washers supplied by Engineering Hardware. The dimensional data, materials and selection notes are summarized here.
What Are PTFE Flat Washers?
PTFE Flat Washers are washers defined by DIN 125 A. They are selected by thread size and the dimensional characteristics shown below, and are available in a range of materials and finishes to suit the application and environment.
Materials & Finishes
Common materials include carbon steel (typically zinc plated or hot-dip galvanized), hardened or case-hardened steel where wear matters, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, hardness where relevant, and the surface finish appropriate to your application and environment.
Specification Guides
Each size, material and standard of PTFE Flat Washers has its own reference page with the figures for that one configuration.
PTFE Flat Washers are supplied to order. Pricing starts from approximately US$0.060 per piece for standard sizes in carbon steel; final pricing depends on size, material, finish and order quantity (MOQ applies). Submit your exact configuration with the quote form above.
Custom manufacturing · Made to drawing
Need a PTFE flat washers outside the standard range?
Bearing area is usually the reason for a special washer: a larger outside diameter to spread load into a softer material, or a thicker section to resist dishing. Made by stamping or punching.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.
01
Cold heading
Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.
Head dimensions and under-head radius checked at set-up and per shift.
02
Thread rolling
Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.
Go / no-go ring gauges to ISO 965 tolerance class 6g.
03
Heat treatment
Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.
Core hardness and tensile tested per lot to ISO 898-1.
04
Surface treatment
Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.
Coating thickness and neutral salt spray hours to ISO 9227.
Third-party video, selected automatically for this topic. It is not produced by Engineering Hardware and is not a specification source — use the tables on this page for dimensional data.
Frequently Asked Questions
What is the controlling standard for PTFE Flat Washers?
PTFE Flat Washers are manufactured to DIN 125 A. The dimensional values on this page follow that standard.
What sizes are available for PTFE Flat Washers?
The table on this page lists 9 sizes for PTFE Flat Washers, ranging from M3 to M20. Sizes outside the table can be quoted on request.
In which materials are PTFE Flat Washers supplied?
PTFE Flat Washers are supplied in carbon steel (zinc plated / HDG) and stainless A2 / A4, with finishes including zinc plating, hot-dip galvanizing and black oxide. Choose material and finish to suit the load and the service environment for PTFE Flat Washers.
How do I request a quotation?
Use the parametric drawing on this page to set the exact configuration (size, material, finish) and click "Request this configuration" — a specialist from Engineering Hardware will respond within one business day.
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